Car-truck



(No Model.)

J. MQLAOHLAN.

GAR TRUCK.

N0. 261,371. H Patented July 18, 1882. J

. 3"- WITNESSES S IDIIVENTOR ATTORNEYS.

U ITED STATES PATENT OFFICE.

JOHN MCLAOHLAN, OF NEW ORLEANS, LOUISIANA.

CAR-TRUCK.

SPECIFICATION forming part of Letters Patent No. 261,371, dated July 18, 1882.

' Application filed December 27, 1881. (No model.)

- New Orleans, in the parish of Orleans and State of Louisiana, have invented a new and Improved Running-Gear for Railway-Oars, of

which the following is a. full, clear, and exact description.

The object of my improvements is to facilitate the travel of cars on curved tracks and the return of the trucks to a straight-line position when the curves are passed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts-in all the figures.

Figure 1 is an inverted plan view of a car provided with my improved running gear. Figs. 2, 8, and 4 are plan views, showing modificat-ions.

Referring to Fig. 1, the car A is mounted with six wheels, two at each end, on axlesaa, and two at its mid-length on an axle, b, that is sustained by boxes 0 c on the fixed pedestals d d, in which the axles have alimited play neath guide-pieces m m, attached to the car, whereby the frames and axles are held up and laterally. The end axles, a a, are sustained on bogie-frames e e, that are hung on tongues f f, so as to swing from blocks g g, attached to the car-bottom. The tongnef of each frame e is formed with a curved head-piece, k, that abuts against the curved face of block 9, and the connection with the block is made by rods i 1', extending through the ends of the headpiece and block loosely, so that the truckecan swing to either side. Around the rods 13 are spiral springs Ir, placed between block 9 and heads on the rods 1', so that as the frames e swing to one side the spring at the opposite side is compressed and tends to restore the straight-line position of the trucks. 0n the frames e there are cross-bars l 1, taking beprevented from dropping when passing a frogplate.

It will be seen the forward and rear wheels are free to radiate or take a curve independently of each other, so that while one is on a curve the other may remain square or be upon a reverse curve. There are no complicated ble.

Different forms of springs may be used and their arrangement varied.

In Fig. 2 bow-springs 7c are shown, which are formed by leaves bent around a block, the ends taking between the tonguesff of the truck-frame. The tongues in this case are pivoted at n, and, if desired, the inner end of the tongues may be between the ends of the bowspring, instead of being outside, as shown.

In Figs. 3 and 4 my invention is shown as applied to a four-wheeled car. Fig. 3 shows the tongue of frame 6 pivoted at "n and its inner end connected. to a slide, 0, on a cross-rod,

p, of a center frame. Sprin gs k k on the rod 19 serve to retain the slide 0 in its middle position. -In Fig. 4 the frame 6 is pivoted at a over the axle, and is formed with a tongue, f, that extends between spring-acted rods q, littcd in a center frame.

The construction shown is especially advantageous for street-cars using only four wheels, for the reason that the axles can be set near the ends of the car and still takea short or reverse curve without excessive friction.

- Having thus described inyinvention, I claim as new and desire to secure by Letters Pa tent- 1. The combination, with a truck having three equidistant pairs of wheels, whose front and rear axles are hun g on pivoted frames and the middle one journaled in fixed pedestals, of the tongues f, blocks 9, the rods i, extending loosely through blocks and head-piece hot the pivoted frames, and the springs, arranged as shown and described.

2. The combination, with the end axles, a, of the frames 6, tongues f, having curved headpiece h, the rods 1' i, and the car-bottom blocks g, having curved faces, as and for the purpose specified.

3. Thecombination of axle-frames e, tongue f, blocks 9, rods z, and springs k, substantially as shown and described,for operation as specified.

JOHN .McLAO HLAN. Witnesses:

E. R. BLIss, M. ScnLnsINeER.

parts,and the whole gearingis light and dura- 

